No trainer solution 9.3x64 next choice any of the .375s from H&H up to RUM or 378 Weatherby. Once you get a 286 - 300 grain bullet over 2500 fps recoil starts to get significant. Over 3,000 fps it starts to really get my attention and not in a good way. Careful what you wish for.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli